Locate the IP address of the phone. This can be done on the phone by the following: Press the Menu button, go to Status, press check button, go to Network, press check button, go to TCP/IP Parameters. press the check button, and the IP should appear along with other info. Open a web browser and type the IP address of the phone in the address bar. The default username/password is admin/456. After logging in, hover over Settings and select Lines. Expand Identification, Outbound Proxy, and Server 1 Under Identification enter the Display Name, Address, Authentication User ID, Authentication Password, and Label.  You should use your Device Username and Password. Under Outbound Proxy enter your SIP Server Address...